public override NoiseMap Build()
{
NoiseMap map = new NoiseMap();
map.SetSize(_destinationWidth, _destinationHeight);
Plane plane = new Plane(_source);
double xExtent = _xUpperBound - _xLowerBound;
double zExtent = _zUpperBound - _zLowerBound;
double xDelta = xExtent / (double)_destinationWidth;
double zDelta = zExtent / (double)_destinationHeight;
double xCur = _xLowerBound;
double zCur = _zLowerBound;
for (uint z = 0; z < _destinationHeight; z++)
{
xCur = _xLowerBound;
for (uint x = 0; x < _destinationWidth; x++)
{
double finalValue;
if (!_seamless)
{
finalValue = plane.GetValue(xCur, zCur);
}
else
{
double swValue, seValue, nwValue, neValue;
swValue = plane.GetValue(xCur, zCur);
seValue = plane.GetValue(xCur + xExtent, zCur);
nwValue = plane.GetValue(xCur, zCur + zExtent);
neValue = plane.GetValue(xCur + xExtent, zCur + zExtent);
double xBlend = 1.0 - ((xCur - _xLowerBound) / xExtent);
double zBlend = 1.0 - ((zCur - _zLowerBound) / zExtent);
double z0 = Interpolation.LinearInterpolate(swValue, seValue, xBlend);
double z1 = Interpolation.LinearInterpolate(nwValue, neValue, xBlend);
finalValue = Interpolation.LinearInterpolate(z0, z1, zBlend);
}
map.SetPoint(x, z, finalValue);
xCur += xDelta;
}
zCur += zDelta;
}
return map;
}